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All-Optical Noninvasive Delayed Feedback Control of Semiconductor Lasers
The stabilization of unstable states hidden in the dynamics of a system, in particular the control of chaos, received much attention in the last years. In this work, a well-known control method called delayed feedback control is applied for the first time entirely in the all-optical domain. A multisection semiconductor laser receives optical feedback from an external Fabry-Perot interferometer. The control signal is a phase-tunable superposition of the laser signal, and provokes the laser to operate in an otherwise unstable periodic state with a period equal to the time delay. The control is noninvasive, because the reflected signal tends to zero when the target state is reached.
Handbook of Chaos Control
This long-awaited revised second edition of the standard reference on the subject has been considerably expanded to include such recent developments as novel control schemes, control of chaotic space-time patterns, control of noisy nonlinear systems, and communication with chaos, as well as promising new directions in research. The contributions from leading international scientists active in the field provide a comprehensive overview of our current level of knowledge on chaos control and its applications in physics, chemistry, biology, medicine, and engineering. In addition, they show the overlap with the traditional field of control theory in the engineering community. An interdisciplinary approach of interest to scientists and engineers working in a number of areas.
Control of Complex Nonlinear Systems with Delay
This research addresses delay effects in nonlinear systems, which are ubiquitous in various fields of physics, chemistry, biology, engineering, and even in social and economic systems. They may arise as a result of processing times or due to the finite propagation speed of information between the constituents of a complex system. Time delay has two complementary, counterintuitive and almost contradictory facets. On the one hand, delay is able to induce instabilities, bifurcations of periodic and more complicated orbits, multi-stability and chaotic motion. On the other hand, it can suppress instabilities, stabilize unstable stationary or periodic states and may control complex chaotic dynamics. This thesis deals with both aspects, and presents novel fundamental results on the controllability of nonlinear dynamics by time-delayed feedback, as well as applications to lasers, hybrid-mechanical systems, and coupled neural systems.
All the Beautiful Liars
'Explores truth and memory with a compelling subtlety' – Jason Goodwin The fictional memoir of Katrina Klain. How true are the family histories that tell us who we are and where we come from? Who knows how much all the beautiful liars have embargoed or embellished the truth? During a long flight from Europe to Sydney to bury her mother, Australian expat Katrina Klain reviews the fading narrative of her family and her long quest to understand her true origins. This has already taken her to Vienna, where she met her Uncle Harald who embezzled the Austrian government out of millions, as well as Carl Sokorny, the godson of one of Hitler's most notorious generals, and then on to Geneva and Madr...
Sylvia
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Sylvia
First acclaimed as a story-length memoir, then expanded into a novel, Sylvia draws us into the lives of a young couple whose struggle to survive Manhattan in the early 1960s involves them in sexual fantasias, paranoia, drugs, and the extreme intimacy of self-destructive violence. Reproducing a time and place with extraordinary clarity, Leonard Michaels explores with self-wounding honesty the excruciating particulars of a youthful marriage headed for disaster.
Plants as alternative hosts for human and animal pathogens
Many of the most prevalent and devastating human and animal pathogens have part of their lifecycle out-with the animal host. These pathogens have a remarkably wide capacity to adapt to a range of quite different environments: physical, chemical and biological, which is part of the key to their success. Many of the well-known pathogens that are able to jump between hosts in different biological kingdoms are transmitted through the faecal-oral and direct transmission pathways, and as such have become important food-borne pathogens. Some high-profile examples include fresh produce-associated outbreaks of Escherichia coli O157:H7 and Salmonella enterica. Other pathogens may be transmitted via di...
Misadventures
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Sylvia
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Sylvia
Story of a woman born into unspeakable poverty, who, against all odds, emerges as a woman of stature, talent and great beauty.
